Radio link failure handling method and related product

ABSTRACT

A method, terminal and non-transitory computer-readable storage medium for processing a radio link failure and a related product are provided. The method includes: triggering, by the terminal, a communication failure process according to a configuration of the Radio Link Control (RLC) layer entity, when the RLC layer entity reaches a maximum number of retransmission times.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation application of InternationalApplication No. PCT/CN2018/084255 filed on Apr. 24, 2018, which claimsthe priority to International Application No. PCT/CN2018/075617 filed onFeb. 7, 2018, and the entire disclosures of both applications are herebyincorporated by reference.

TECHNICAL FIELD

The present application relates to the technical field of communication,in particular to a method for processing a radio link failure and arelated product.

BACKGROUND

In a wireless communication system, a terminal detects a signal qualityof a neighboring cell using a carrier according to information of thecarrier sent from network side. For a carrier aggregation system such asa long-term evolution advance (LTE-A) system, etc., a terminal may havemultiple carriers serving the terminal at the same time. Carrieraggregation under a base station is called an aggregation cell. When anaggregation cell provides a service for a terminal, the terminal cansimultaneously use multiple uplink and downlink carriers for datatransmission. If a radio link failure occurs on only a part of carriers(uplink and/or downlink), the terminal can still communicate with thebase station through other carriers without failure. Only when radiolink failures occur on all carriers (downlink and/or uplink), theterminal determines that the radio link fails and initiates a RadioResource Control (RRC) connection reestablishment process to resume asignaling connection with the base station. In a current discussion of anew radio system, for an RLC entity, if a group of cells configured fora corresponding logical channel are all secondary cells, then when acertain RLC SDU of AM RLC is retransmitted up to a maximum number oftimes, RRC reconfiguration may not be triggered, but only the event thatretransmission reaches the maximum number of times needs to be reported,thus reducing impact of reconfiguration on a terminal. However, there isno discussion on how to configure an RLC entity accordingly so far.

SUMMARY

Implementations of the present application provide a method forprocessing a radio link failure and a related product.

In a first aspect, an implementation of the present application providesa method for processing a radio link failure, which is applied to aterminal, wherein the terminal includes a Radio Link Control (RLC) layerentity, and the method includes: triggering a communication failureprocess according to a configuration of the RLC layer entity, when theRLC layer entity reaches a maximum number of retransmission times.

In a second aspect, an implementation of the present applicationprovides a terminal. The terminal has a function of implementing actionsof the terminal designed in the above method. The functions may beimplemented by using hardware, or may be implemented by executingcorresponding software through hardware. The hardware or softwareincludes one or more modules corresponding to the above functions. In apossible design, the terminal includes a processor. The processor isconfigured to support the terminal to execute a corresponding functionin the above methods. Moreover, the terminal may further include atransceiver. The transceiver is used for supporting communicationbetween the terminal and a network device. The terminal may furtherinclude a memory. The memory is used for coupling to the processor, andstoring essential program instructions and data of the terminal.

In a third aspect, an implementation of the present application providesa terminal. The terminal includes a processor, a memory, a communicationinterface, and one or more programs, wherein the one or more programsare stored in the memory and configured to be executed by the processor,and the program includes instructions for executing acts in any methodof the second aspect in the implementation of the present application.

In a fourth aspect, an implementation of the present applicationprovides a computer-readable storage medium. The computer-readablestorage medium stores a computer program for electronic datainterchange, wherein the computer program makes a computer execute allor part of acts as described in any method of the first aspect in theimplementation of the present application.

In a fifth aspect, an implementation of the present application providesa computer program product, wherein the computer program productincludes a non-transitory computer-readable storage medium storing acomputer program and the computer program is operable to make a computerexecute all or part of acts as described in any method of the firstaspect in the implementation of the present application. The computerprogram product may be a software installation package.

BRIEF DESCRIPTION OF THE DRAWINGS

The following is a brief description of accompanying drawings which arerequired for describing implementations or the prior art.

FIG. 1A is a diagram of a network architecture of a possiblecommunication system according to an implementation of the presentapplication;

FIG. 1B is a schematic diagram of a PDCP data duplication functionaccording to an implementation of the present application;

FIG. 2 is a flowchart of a method for processing a radio link failureaccording to an implementation of the present application;

FIG. 3 is a flowchart of a method for processing a radio link failureaccording to an implementation of the present application;

FIG. 4 is a flowchart of a method for processing a radio link failureaccording to an implementation of the present application;

FIG. 5 is a schematic diagram of structure of a terminal according to animplementation of the present application;

FIG. 6 is a schematic diagram of structure of a terminal according to animplementation of the present application.

DETAILED DESCRIPTION

The following describes technical solutions in implementations of thepresent application with reference to the accompanying drawings.

As an example, FIG. 1A shows a wireless communication system involved inthe present application. The wireless communication system 100 may workon a high frequency band, and the wireless communication system is notlimited to a Long Term Evolution (LTE) system, it may be a 5thGeneration mobile communication (the 5th Generation, 5G) system evolvedin the future, a New Radio (NR) system, a Machine to Machine (M2M)system, or the like. The wireless communication system 100 may include:one or more network devices 101, one or more terminals 103, and a corenetwork device 105. The network device 101 may be a base station. Thebase station may be used for communicating with one or more terminals,or may be used for communicating with one or more base stations withpartial terminal functions (such as a macro base station and a microbase station). The base station may be a base transceiver station (BTS)in a time division synchronous code division multiple access (TD-SCDMA)system, or an evolutional node B (eNB) in an LTE system, or a basestation in the 5G system or the NR system. In addition, the base stationmay be an Access Point (AP), a transport point (TRP), a Central Unit(CU), or other network entities, and may include parts or all offunctions of the above network entities. The core network device 105includes a device of a core network side such as an Access and MobilityManagement Function (AMF) entity, a User Plane Function (UPF) entity,and a Session Management Function (SMF) entity, etc. The terminal 103may be distributed throughout the overall wireless communication system100, which may be static or mobile. In some implementations of thepresent application, the terminal 103 may be a mobile device (e.g., asmart phone), a mobile station, a mobile unit, an M2M terminal, awireless unit, a remote unit, a user agent, a mobile client, etc.

It should be noted that the wireless communication system 100 shown inFIG. 1A is only for more clearly explaining the technical solutions ofthe present application, and does not constitute a limitation to thepresent application. Those of ordinary skill in the art should know thatwith evolution of network architecture and emergence of new servicescenarios, the technical solutions provided by the present applicationare also applicable to similar technical problems.

Related technologies involved in the present application are describedbelow.

At present, in the 5th-Generation (5G) and NR systems, in a currentdiscussion of NR, for data duplication, the data duplication have beencarried out simultaneously based on an approach of PDCP duplication toimprove reliability of data transmission. NR currently defines twoarchitectures to support data duplication: for a case of carrieraggregation (CA), a scheme supporting data duplication utilizes afunction of a PDCP layer for duplicating data to make duplicated PDCPPDUs to be transmitted to two RLC entities (two different logicalchannels) respectively, and finally ensures that duplicated PDCP PDUscan be transmitted on different physical layer aggregated carriers, thusachieving frequency diversity gain to improve reliability of datatransmission. The specific protocol structure is shown in FIG. 1B. Alogical channel corresponding to a Radio Link Control layer (RLC layer)entity can be configured with a cell or a group of cells (groups), andcells (groups) configured for two logical channels under CA duplicationare different, so that duplicated PDCP PDUs can be transmitted ondifferent carriers, thereby improving an effect of transmissiondiversity to achieve a purpose of improving reliability. In a discussionat the 99th meeting in a discussion of NR RAN2, there are the followingconclusions: #99 Agreements

1. RLC reports maxNumberofRLC retransmissions are reached to RRC.

2. For a logical channel restricted to one or multiple SCell(s) (i.e.logical channel configured for duplication) UE reports the failure tothe gNB (e.g. SCell-RLF) but no RRC re-establishment happens.

For an RLC entity, if a group of cell configured for a correspondinglogical channel are all secondary cells, then when retransmission of acertain RLC SDU of AM RLC reaches a maximum number of times, RRCreconfiguration may not be triggered, and only the event that theretransmission reaches the maximum number of times may be reported, thusreducing impact of reconfiguration on a UE. However, there is nodiscussion on how to configure an RLC entity accordingly so far.

To address the above problem, the implementations of the presentapplication provide following implementations, which will be describedin detail below with reference to the accompanying drawings.

Please refer to FIG. 2. FIG. 2 is a method for processing a radio linkfailure according to an implementation of the present application, whichis applied to a terminal in the above exemplary communication system.The terminal includes a Radio Link Control (RLC) layer entity. Themethod includes act 201.

In act 201, the terminal triggers a communication failure processaccording to a configuration of the RLC layer entity, when the RLC layerentity reaches a maximum number of retransmission times.

Herein, that the RLC layer entity reaches the maximum number ofretransmission times refers to that the number of data retransmissiontimes of the RLC layer reaches a preset maximum retransmissionthreshold, which can specifically be counted by a retransmission counterassociated with an RLC Service Data Unit (SDU) processed by the RLClayer entity.

Herein, the maximum number of retransmission times can be predeterminedby a protocol, and the numerical value can be 2 times, 3 times, 4 times,etc., which is not uniquely limited here.

Herein, the RLC layer is located between a Packet Data ConvergenceProtocol (PDCP) layer and a Medium Access Control (MAC) layer. Itcommunicates with a PDCP layer through a Service Access Point (SAP), andcommunicates with a MAC layer through a logical channel. Each logicalchannel of each terminal has an RLC layer entity. Data received by anRLC layer entity from a PDCP layer or data sent to a PDCP layer arecalled an RLC SDU (or PDCP PDU). Data received by an RLC entity from aMAC layer or data sent to a MAC layer are called an RLC PDU (or MACSDU).

A function of an RLC layer is realized by an RLC entity. An RLC entitycan be configured to be in one of the following three modes: (1)Transparent Mode (TM): corresponding to a TM RLC entity, abbreviated asa TM entity. This mode can be considered as empty RLC, because onlypassthrough function of data is provided in this mode. (2)Unacknowledged Mode (UM): corresponding to a UM RLC entity, abbreviatedas a UM entity. This mode provides all RLC functions exceptretransmission and re-segmentation, thus providing an unreliabletransmission service. (3) Acknowledged Mode (AM): corresponding to an AMRLC entity, abbreviated as an AM entity. Through error detection andretransmission, an AM mode provides a reliable transmission service.This mode provides all RLC functions.

It can be seen that in implementations of the present application, aterminal triggers a communication failure process according to aconfiguration of the RLC layer entity, when the RLC layer entity reachesa maximum number of retransmission times. Since configurationscorresponding to different RLC entities can be different, the terminalcan distinguish different configurations of RLC layer entities totrigger different radio link failure processes, so that radio linkinterruptions of the terminal can be reduced as much as possible, and alink failure can be recovered in time, which is beneficial to improvingreliability of wireless communication of the terminal.

In a possible example, the communication failure includes any of thefollowing: a radio link failure, a radio link failure of a SecondaryCell Group (SCG), a radio link failure of a Secondary Cell (SCell).

Herein, the radio link failure is also called a radio link failure of aPrimary Cell Group (MCG).

It can be seen that, in this example, because a communication failureprocess includes one of a variety of link failure situations, that is tosay, in the 5G NR system, a terminal can more accurately initiate aradio link failure process, avoiding a too long interruption delaycaused by not identifying a radio link failure in time, reducing radiolink interruptions of the terminal as much as possible, and recovering alink failure in time, which is beneficial to improving reliability ofwireless communication of the terminal.

In a possible example, a carrier set configured for a logical channelcorresponding to the RLC layer entity includes a Primary Cell (PCell);and triggering the communication failure process according to theconfiguration of the RLC layer entity includes: triggering a radio linkfailure process.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Cell (PCell) specifically refers to the following situation:logical channel data corresponding to the RLC layer entity can betransmitted on the PCell, in a case that a bearer corresponding to theRLC layer entity is configured with data duplication and the dataduplication is activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Cell (PCell) specifically refers to the following situation:logical channel data corresponding to the RLC layer entity can betransmitted on the PCell, in a case that a bearer corresponding to theRLC layer entity is configured with data duplication but the dataduplication is not activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Cell (PCell) specifically refers to the following situation:logical channel data corresponding to the RLC layer entity can betransmitted on the PCell, in a case that a bearer configurationcorresponding to the RLC layer entity is not configured with dataduplication.

In this possible example, the RLC layer entity refers to a Primary RadioLink Control (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).

The above process of triggering the radio link failure process includesthe following steps (1), (2) and (3).

(1) Suspend all radio bearers except a signal radio bearer SRB0 (suspendall RBs except SRB0).

(2) Reset a MAC layer (reset MAC).

(3) Initialize transmission of an RRC connection reestablishment requestmessage (initiate transmission of theRRCConnectionReestablishmentRequest message).

Herein, the radio link failure is also called a radio link failure ofMaster Cell Group (MCG).

It can be seen that in this example, for a case that a carrier setconfigured for a logical channel corresponding to the RLC layer entityincludes a Primary Cell (PCell), the terminal can trigger a radio linkfailure process according to a configuration of the RLC layer entity,suspend all radio bearers except the SRB0, reset a MAC layer, initializetransmission of RRC connection reestablishment request message, andrecover a link failure in time, which is beneficial to improvingreliability of wireless communication of the terminal.

In a possible example, a carrier set configured for a logical channelcorresponding to the RLC layer entity includes a Primary Secondary Cell(PSCell); and triggering the communication failure process according tothe configuration of the RLC layer entity includes: triggering a radiolink failure process of Secondary Cell Group (SCG).

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Secondary Cell (PSCell) specifically refers to the followingsituation: logical channel data corresponding to the RLC layer entitycan be transmitted on the PSCell, in a case that a bearer correspondingto the RLC layer entity is configured with data duplication and the dataduplication is activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Secondary Cell (PSCell) specifically refers to the followingsituation: logical channel data corresponding to the RLC layer entitycan be transmitted on the PSCell, in a case that a bearer correspondingto the RLC layer entity is configured with data duplication but the dataduplication is not activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Secondary Cell (PSCell) specifically refers to the followingsituation: logical channel data corresponding to the RLC layer entitycan be transmitted on the PSCell, in a case that a bearer correspondingto the RLC layer entity is not configured with data duplication.

In this possible example, the RLC layer entity refers to a Primary RadioLink Control (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).

The above process of triggering a radio link failure process ofSecondary Cell Group (SCG) includes the following steps (4), (5) and(6).

(4) Suspend all SCG data radio data bearers and suspend transmission ofthe SCG part for split data bearers (suspend all SCG DRBs and suspendSCG transmission for split DRBs).

(5) Reset a SCG MAC layer (reset SCG-MAC).

(6) Initiate transmission of a SCG radio link failure message to anetwork (initiate transmission of the SCGFailureInformation message inaccordance with 5.6.13.3).

It can be seen that in this example, for a case that a carrier setconfigured for a logical channel corresponding to the RLC layer entityincludes a Primary Secondary Cell (PSCell), a terminal can trigger aradio link failure process of Secondary Cell Group (SCG) according to aconfiguration of the RLC layer entity, suspend all SCG data radio databearers and suspend transmission of the SCG part for split data bearers,reset a SCG MAC layer, and initiate transmission of a SCG radio linkfailure message to a network, so as to recover a link failure in time,which is beneficial to improving reliability of wireless communicationof the terminal.

In a possible example, a carrier set configured for a logical channelcorresponding to the RLC layer entity only includes an SCell; andtriggering the communication failure process according to theconfiguration of the RLC layer entity includes: triggering reporting ofa radio link failure in the Secondary Cell (SCell).

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity only includes theSCell specifically refers to the following situation: logical channeldata corresponding to the RLC layer entity can only be transmitted onthe SCell, in a case that a bearer corresponding to the RLC layer entityis configured with data duplication and the data duplication isactivated.

In this possible example, the RLC layer entity refers to a Primary RadioLink Control (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).

In this possible example, the RLC layer entity refers to a secondaryRadio Link Control (RLC) layer entity under a carrier aggregationduplication function (CA duplication).

It can be seen that in this example, for a case that a carrier setconfigured for a logical channel corresponding to the RLC layer entityonly contains an SCell, the terminal can trigger reporting of aSecondary Cell (SCell) radio link failure according to a configurationof the RLC layer entity, and recover a link failure in time, which isbeneficial to improving reliability of wireless communication of theterminal.

In a possible example, the secondary RLC refers to an RLC layer entitythat no longer receives new data of a PDCP layer entity after a carrieraggregation duplication function (CA duplication) of the terminal isdeactivated.

In a possible example, the Primary RLC layer entity refers to an RLClayer entity that continues to receive new data from a PDCP layer entityafter a carrier aggregation duplication function (CA duplication) of theterminal is deactivated.

Consistent with the implementation shown in FIG. 2, please refer to FIG.3. FIG. 3 is another method for processing a radio link failureaccording to an implementation of the present application, which isapplied to a terminal in the above exemplary communication system. Theterminal includes a Radio Link Control (RLC) layer entity. The methodincludes act 301.

In act 301, the terminal triggers a communication failure process, whenthe RLC layer entity reaches a maximum number of retransmission times,which refers to that a number of retransmission times of the RLC layerreaches a preset maximum retransmission threshold.

Herein, a carrier set configured for a logical channel corresponding tothe RLC layer entity includes a Primary Cell (PCell), and the RLC layerentity refers to a Primary Radio Link Control (RLC) layer entity under acarrier aggregation duplication function (CA duplication).

The above process of triggering the radio link failure process includesthe following steps (1), (2) and (3).

(1) Suspend all radio bearers except a signal radio bearer SRB0 (suspendall RBs except SRB0).

(2) Reset a MAC layer (reset MAC).

(3) Initialize transmission of an RRC connection reestablishment requestmessage (initiate transmission of theRRCConnectionReestablishmentRequest message).

It can be seen that in implementations of the present application, aterminal triggers a communication failure process according to aconfiguration of the RLC layer entity, when the RLC layer entity reachesa maximum number of retransmission times. Since configurationscorresponding to different RLC entities can be different, the terminalcan distinguish different configurations of RLC layer entities totrigger different radio link failure processes, so that radio linkinterruptions of the terminal can be reduced as much as possible, and alink failure can be recovered in time, which is beneficial to improvingreliability of wireless communication of the terminal.

In addition, for a case that a carrier set configured for a logicalchannel corresponding to the RLC layer entity includes a Primary Cell(PCell), the terminal can trigger a radio link failure process accordingto a configuration of the RLC layer entity, suspend all radio bearersexcept the signal radio bearer SRB0, reset a MAC layer, initializetransmission of an RRC connection reestablishment request message, andrecover a link failure in time, which is beneficial to improvingreliability of wireless communication of the terminal.

Consistent with the implementations of FIGS. 2 and 3, please refer toFIG. 4. FIG. 4 is a method for processing a radio link failure accordingto an implementation of the present application, which is applied to aterminal in the above exemplary communication system. The terminalincludes a Radio Link Control (RLC) layer entity. The method includesact 401.

In act 401, the terminal triggers a radio link failure process ofSecondary Cell Group (SCG), when the RLC layer entity reaches themaximum number of retransmission times, which refers to that a number ofretransmission times of the RLC layer reaches a preset maximumretransmission threshold.

Herein, a carrier set configured for a logical channel corresponding tothe RLC layer entity includes a Primary Secondary Cell (PSCell), and theRLC layer entity refers to a Primary Radio Link Control (RLC) layerentity under a carrier aggregation duplication function (CAduplication).

The above process of triggering the radio link failure process ofSecondary Cell Group (SCG) includes the following steps (4), (5) and(6).

(4) Suspend all SCG data radio data bearers and transmission of the SCGpart for split data bearers (suspend all SCG DRBs and suspend SCGtransmission for split DRBs).

(5) Reset a SCG MAC layer (reset SCG-MAC).

(6) Initiate transmission of a SCG radio link failure message to anetwork (initiate transmission of the SCGFailureInformation message inaccordance with 5.6.13.3).

It can be seen that in implementations of the present application, aterminal triggers a communication failure process according to aconfiguration of the RLC layer entity, when the RLC layer entity reachesa maximum number of retransmission times. Since configurationscorresponding to different RLC entities can be different, the terminalcan distinguish different configurations of RLC layer entities totrigger different radio link failure processes, so that radio linkinterruptions of the terminal can be reduced as much as possible, and alink failure can be recovered in time, which is beneficial to improvingreliability of wireless communication of the terminal.

In addition, for a case that a carrier set configured for a logicalchannel corresponding to the RLC layer entity includes a PrimarySecondary Cell (PSCell), the terminal can trigger a radio link failureprocess of Secondary Cell Group (SCG) according to a configuration ofthe RLC layer entity, suspend all SCG data radio data bearers andsuspend transmission of the SCG part for split data bearers, reset a SCGMAC layer, and initiate transmission of a SCG radio link failure messageto a network, so as to recover a link failure in time, which isbeneficial to improving reliability of wireless communication of theterminal.

Consistent with the above implementation, referring to FIG. 5, FIG. 5 isa schematic structural diagram of a terminal according to animplementation of the present disclosure. As shown in FIG. 5, theterminal includes a processor, a memory, a communication interface, andone or more programs, wherein the one or more programs are stored in thememory and configured to be executed by the processor, and the programincludes instructions for performing the following acts: triggering acommunication failure process according to a configuration of the RLClayer entity, when the RLC layer entity reaches a maximum number ofretransmission times.

It can be seen that in implementations of the present application, aterminal triggers a communication failure process according to aconfiguration of the RLC layer entity, when the RLC layer entity reachesa maximum number of retransmission times. Since configurationscorresponding to different RLC entities can be different, the terminalcan distinguish different configurations of RLC layer entities totrigger different radio link failure processes, so that radio linkinterruptions of the terminal can be reduced as much as possible, and alink failure can be recovered in time, which is beneficial to improvingreliability of wireless communication of the terminal.

In a possible example, the communication failure includes any of thefollowing: a radio link failure, a radio link failure of Secondary CellGroup (SCG), a radio link failure of Secondary Cell (SCell).

In a possible example, that the RLC layer entity reaches the maximumnumber of retransmission times refers to that a number of retransmissiontimes of the RLC layer reaches a preset maximum retransmissionthreshold.

In a possible example, a carrier set configured for a logical channelcorresponding to the RLC layer entity includes a Primary Cell (PCell);and in an aspect of triggering the communication failure processaccording to the configuration of the RLC layer entity, the instructionsin the program are specifically used for executing the followingoperation: triggering a radio link failure process.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Cell (PCell) specifically refers to the following situation:logical channel data corresponding to the RLC layer entity can betransmitted on the PCell, in a case that a bearer corresponding to theRLC layer entity is configured with data duplication, and the dataduplication is activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Cell (PCell) specifically refers to the following situation:logical channel data corresponding to the RLC layer entity can betransmitted on the PCell, in a case that a bearer corresponding to theRLC layer entity is configured with data duplication but the dataduplication is not activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Cell (PCell) specifically refers to the following situation:logical channel data corresponding to the RLC layer entity can betransmitted on the PCell, in a case that a bearer configurationcorresponding to the RLC layer entity is not configured with dataduplication.

In a possible example, the RLC layer entity refers to a Primary RadioLink Control (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).

In a possible example, a carrier set configured for a logical channelcorresponding to the RLC layer entity includes a Primary Cell andSecondary Cell (PSCell); and in an aspect of triggering thecommunication failure process according to the configuration of the RLClayer entity, the instructions in the program are specifically used forexecuting the following operation: triggering a radio link failureprocess of Secondary Cell Group (SCG).

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Secondary Cell (PSCell) specifically refers to the followingsituation: logical channel data corresponding to the RLC layer entitycan be transmitted on the PSCell, in a case that a bearer correspondingto the RLC layer entity is configured with data duplication and the dataduplication is activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Secondary Cell (PSCell) specifically refers to the followingsituation: logical channel data corresponding to the RLC layer entitycan be transmitted on the PSCell, in a case that a bearer correspondingto the RLC layer entity is configured with data duplication but the dataduplication is not activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Secondary Cell (PSCell) specifically refers to the followingsituation: logical channel data corresponding to the RLC layer entitycan be transmitted on the PSCell, in a case that a bearer correspondingto the RLC layer entity is not configured with data duplication.

In this possible example, the RLC layer entity refers to a Primary RadioLink Control (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).

In a possible example, a carrier set configured for a logical channelcorresponding to the RLC layer entity only includes an SCell; and in anaspect of triggering the communication failure process according to theconfiguration of the RLC layer entity, the instructions in the programare specifically used for executing the following operation: triggeringreporting of a radio link failure in the Secondary Cell (SCell).

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity only includes theSCell specifically refers to the following situation: logical channeldata corresponding to the RLC layer entity can only be transmitted onthe SCell, in a case that a bearer corresponding to the RLC layer entityis configured with data duplication and the data duplication isactivated.

In this possible example, the RLC layer entity refers to a Primary RadioLink Control (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).

In this possible example, the RLC layer entity refers to a secondaryRadio Link Control (RLC) layer entity under a carrier aggregationduplication function (CA duplication).

In a possible example, the secondary RLC refers to an RLC layer entitythat no longer receives new data of a PDCP layer entity after a carrieraggregation duplication function (CA duplication) of the terminal isdeactivated.

In a possible example, the Primary RLC layer entity refers to an RLClayer entity that continues to receive new data from a PDCP layer entityafter a carrier aggregation duplication function (CA duplication) of theterminal is deactivated.

The above describes the solutions provided in the implementations of thepresent application mainly from a perspective of interaction betweennetwork elements. It can be understood that the terminal and the networkdevice include corresponding hardware structures and/or software modulesfor performing the various functions, so as to implement the abovefunctions. A person skilled in the art should easily understand that, incombination with units and algorithm steps in examples described withreference to the implementations disclosed herein, the presentapplication may be implemented by hardware or a combination of hardwareand computer software. Whether a function is performed by hardware orcomputer software driving hardware depends on a particular applicationand a design constraint condition of the technical solution. A personskilled in the art may use different methods to implement the describedfunctions for each particular application, but it should not beconsidered that such an implementation goes beyond the scope of thepresent application.

Division for functional units can be performed for the terminal andnetwork device in the implementations of the present applicationaccording to the above method examples. For example, various functionalunits may be divided according to various functions, or two or morefunctions can be integrated into one processing unit. The aforementionedintegrated unit may be implemented in a form of hardware, or may beimplemented in a form of a software program module. It should be notedthat, the division of the units in the implementations of the presentapplication is illustrative, and is merely the division of logicalfunctions. Other division modes may be used in actual implementations.

In the case that an integrated unit is used, FIG. 6 illustrates a blockdiagram of possible composition of possible functional units of aterminal related to the above implementations. A terminal 600 includes aprocessing unit 602 and a communication unit 603. The processing unit602 is used for controlling and managing acts of the terminal. Forexample, the processing unit 602 is used for supporting the terminal toperform act 201 in FIG. 2, act 301 in FIG. 3, act 401 in FIG. 4, and/orother processes for techniques described in this document. Thecommunication unit 603 is used for supporting communication between theterminal and other devices, such as communication between the terminaland network device as illustrated in FIG. 5. The terminal may furtherinclude a storage unit 601 used for storing program codes and data ofthe terminal.

The processing unit 602 may be a processor or a controller such as aCentral Processing Unit (CPU), a general purpose processor, a DigitalSignal Processor (DSP), an Application-Specific Integrated Circuit(ASIC), a Field Programmable Gate Array (FPGA), or other programmablelogic device, transistor logic device, hardware component, or anycombination thereof. The processing unit 601 may implement or executethe various illustrative logical blocks, modules, and circuits describedin combination with disclosed contents of the present application. Theprocessor may also be a combination for implementing computingfunctions, e.g., a combination including one or more microprocessors, acombination of a DSP and a microprocessor. The communication unit 603may be a transceiver or a transceiving circuit, and so on. The storageunit 601 may be a memory.

Herein, the processing unit 602 is used for triggering a communicationfailure process according to a configuration of the RLC layer entity,when the RLC layer entity reaches a maximum number of retransmissiontimes through the communication unit 603.

It can be seen that in implementations of the present disclosure, theterminal triggers a communication failure process according to aconfiguration of the RLC layer entity, when the RLC layer entity reachesa maximum number of retransmission times. Since configurationscorresponding to different RLC entities can be different, the terminalcan distinguish different configurations of RLC layer entities totrigger different radio link failure processes, so that radio linkinterruptions of the terminal can be reduced as much as possible, and alink failure can be recovered in time, which is beneficial to improvingreliability of wireless communication of the terminal.

In a possible example, the communication failure includes any of thefollowing: a radio link failure, a radio link failure of Secondary CellGroup (SCG), a radio link failure of Secondary Cell (SCell).

In a possible example, that the RLC layer entity reaches the maximumnumber of retransmission times refers to that a number of retransmissiontimes of the RLC layer reaches a preset maximum retransmissionthreshold.

In a possible example, a carrier set configured for a logical channelcorresponding to the RLC layer entity includes a Primary Cell (PCell);and in an aspect of triggering a communication failure process accordingto the configuration of the RLC layer entity, the processing unit 602 isspecifically used for triggering a radio link failure process.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Cell (PCell) specifically refers to the following situation:logical channel data corresponding to the RLC layer entity can betransmitted on the PCell, in a case that a bearer corresponding to theRLC layer entity is configured with data duplication and the dataduplication is activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Cell (PCell) specifically refers to the following situation:logical channel data corresponding to the RLC layer entity can betransmitted on the PCell, in a case that a bearer corresponding to theRLC layer entity is configured with data duplication but the dataduplication is not activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Cell (PCell) specifically refers to the following situation:logical channel data corresponding to the RLC layer entity can betransmitted on the PCell, in a case that a bearer configurationcorresponding to the RLC layer entity is not configured with dataduplication.

In this possible example, the RLC layer entity refers to a Primary RadioLink Control (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).

In a possible example, a carrier set configured for a logical channelcorresponding to the RLC layer entity includes a Primary Secondary Cell(PSCell); and in an aspect of triggering the communication failureprocess according to the configuration of the RLC layer entity, theprocessing unit 602 is specifically used for triggering a radio linkfailure process of Secondary Cell Group (SCG).

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Secondary Cell (PSCell) specifically refers to the followingsituation: logical channel data corresponding to the RLC layer entitycan be transmitted on the PSCell, in a case that a bearer correspondingto the RLC layer entity is configured with data duplication and the dataduplication is activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Secondary Cell (PSCell) specifically refers to the followingsituation: logical channel data corresponding to the RLC layer entitycan be transmitted on the PSCell, in a case that a bearer correspondingto the RLC layer entity is configured with data duplication but the dataduplication is not activated.

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity includes thePrimary Secondary Cell (PSCell) specifically refers to the followingsituation: logical channel data corresponding to the RLC layer entitycan be transmitted on the PSCell, in a case that a bearer correspondingto the RLC layer entity is not configured with data duplication.

In a possible example, the RLC layer entity refers to a Primary RadioLink Control (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).

In a possible example, a carrier set configured for a logical channelcorresponding to the RLC layer entity only includes SCell; and in anaspect of triggering the communication failure process according to theconfiguration of the RLC layer entity, the processing unit 602 isspecifically used for triggering reporting of a radio link failure ofSecondary Cell (SCell).

In this possible example, that the carrier set configured for thelogical channel corresponding to the RLC layer entity only includes theSCell specifically refers to the following situation: logical channeldata corresponding to the RLC layer entity can only be transmitted onthe SCell, in a case that a bearer corresponding to the RLC layer entityis configured with data duplication and the data duplication isactivated.

In this possible example, the RLC layer entity refers to a Primary RadioLink Control (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).

In this possible example, the RLC layer entity refers to a secondaryRadio Link Control (RLC) layer entity under a carrier aggregationduplication function (CA duplication).

In a possible example, the secondary RLC refers to an RLC layer entitythat no longer receives new data of a PDCP layer entity after a carrieraggregation duplication function (CA duplication) of the terminal isdeactivated.

In a possible example, the Primary RLC layer entity refers to an RLClayer entity that continues to receive new data from a PDCP layer entityafter a carrier aggregation duplication function (CA duplication) of theterminal is deactivated.

When the processing unit 602 is a processor, the communication unit 603is a communications interface, and the storage unit 601 is a memory. Theterminal related to implementations of the present application may theterminal shown in FIG. 6.

An implementation of the present application also provides a computerreadable storage medium. The computer readable storage medium stores acomputer program for electronic data interchange, wherein the computerprogram makes a computer execute parts or all of the acts described forthe terminal in the above method implementations.

An implementation of the present application also provides a computerreadable storage medium. The computer readable storage medium stores acomputer program for electronic data interchange, and the computerprogram causes a computer to execute parts or all of the acts describedfor the network device in the above method implementations.

An implementation of the present application also provides a computerprogram product, wherein the computer program product includes anon-transitory computer readable storage medium storing a computerprogram, and the computer program is operable to make a computer executeparts or all of the acts described for the terminal in the above methodimplementations. The computer program product may be a softwareinstallation package.

An implementation of the present application also provides a computerprogram product, wherein the computer program product includes anon-transitory computer readable storage medium storing a computerprogram, and the computer program is operable to make a computer executeparts or all of the acts described for the network device in the abovemethod. The computer program product may be a software installationpackage.

The acts of the method or algorithm described in the implementations ofthe present application may be implemented in hardware or may beimplemented by a processor executing software instructions. The softwareinstructions may be composed by corresponding software modules. Thesoftware modules may be stored in a Random Access Memory (RAM), a flashmemory, a Read Only Memory (ROM), an Erasable Programmable Read OnlyMemory (EPROM), an Electrically Erasable Programmable Read Only Memory(EEPROM), a register, a hard disk, a removable hard disk, a Compact DiscRead-Only Memory (CD-ROM), or a storage medium in any other formwell-known in the art. An exemplary storage medium is coupled to theprocessor such that the processor can read information from a storagemedium, and write information to the storage medium. Of course, thestorage medium may be a component of the processor. The processor andthe storage medium may be located in an ASIC. In addition, the ASIC maybe located in an access network device, a target network device, or acore network device. The processor and the storage medium may also actas separate components in the access network device, the target networkdevice, or the core network device.

Those skilled in the art should realize that in one or more examplesdescribed above, the functions described in the implementations of thepresent application may be implemented in whole or in parts throughsoftware, hardware, firmware, or any combination thereof. When thefunctions described in the implementations of the present applicationare implemented through software, these functions may be implemented inwhole or in parts in the form of a computer program product. Thecomputer program product includes one or more computer instructions.When the computer program instructions are loaded and executed on acomputer, the processes or functions are generated in whole or in partsaccording to the implementations of the present application. Thecomputer may be a general purpose computer, a special purpose computer,a computer network, or other programmable devices. The computerinstructions may be stored in a computer-readable storage medium, ortransmitted from one computer-readable storage medium to anothercomputer-readable storage medium, for example, the computer instructionsmay be transmitted from a website site, a computer, a server, or a datacenter to another website site, computer, server, or data center througha wired mode (e.g., a coaxial cable, an optical fiber, a DigitalSubscriber Line (DSL)) or a wireless mode (e.g., infrared radiation,radio, microwave, etc). The computer-readable storage medium may be anyavailable medium that the computer can access, or a data storage devicesuch as an integrated server or data center that includes one or moreavailable media. The available medium may be a magnetic medium (e.g., afloppy disk, a hard disk, a magnetic tape), an optical medium (e.g., aDigital Video Disc (DVD)), or a semiconductor medium (e.g., a SolidState Disk (SSD)), or the like.

Purposes, technical solutions and beneficial effects of implementationsof the present application are further explained in the above specificimplementation modes in detail. It should be understood that the aboveis only the specific implementation modes of implementations of thepresent application, and is not used to limit the protection scope ofimplementations of the present application. Any modification, equivalentsubstitution, improvement, etc., made on the basis of technicalsolutions of implementations of the present application shall beincluded in the protection scope of implementations of the presentapplication.

What is claimed is:
 1. A method for processing a radio link failure,applied to a terminal, wherein the terminal comprises a Radio LinkControl (RLC) layer entity, and the method comprises: triggering acommunication failure process according to a configuration of the RLClayer entity, when the RLC layer entity reaches a maximum number ofretransmission times; wherein a carrier set configured for a logicalchannel corresponding to the RLC layer entity comprises a PrimarySecondary Cell (PSCell); and triggering the communication failureprocess according to the configuration of the RLC layer entitycomprises: triggering a radio link failure process of a Secondary CellGroup (SCG); wherein the triggering the radio link failure processcomprises the following steps: suspending all radio bearers except asignal radio bearer SRB0; resetting a Medium Access Control (MAC) layer;and initializing transmission of a Radio Resource Control (RRC)connection reestablishment request message.
 2. The method of claim 1,wherein the communication failure comprises any one of the following: aradio link failure, a radio link failure of a Secondary Cell Group(SCG), or a radio link failure of a Secondary Cell (SCell).
 3. Themethod of claim 1, wherein that the RLC layer entity reaches the maximumnumber of retransmission times refers to that a number of dataretransmission times of the RLC layer entity reaches a preset maximumretransmission threshold.
 4. The method of claim 1, wherein a carrierset configured for a logical channel corresponding to the RLC layerentity comprises a Primary Cell (PCell); and triggering thecommunication failure process according to the configuration of the RLClayer entity comprises: triggering a radio link failure process.
 5. Themethod of claim 4, wherein that the carrier set configured for thelogical channel corresponding to the RLC layer entity comprises thePrimary Cell (PCell) specifically refers to a following situation:logical channel data corresponding to the RLC layer entity is allowed tobe transmitted on the PCell, in a case that a bearer corresponding tothe RLC layer entity is configured with data duplication and the dataduplication is activated.
 6. The method of claim 4, wherein that thecarrier set configured for the logical channel corresponding to the RLClayer entity comprises the Primary Cell (PCell) specifically refers to afollowing situation: logical channel data corresponding to the RLC layerentity is allowed to be transmitted on the PCell, in a case that abearer corresponding to the RLC layer entity is configured with dataduplication but the data duplication is not activated.
 7. The method ofclaim 4, wherein that the carrier set configured for the logical channelcorresponding to the RLC layer entity comprises the Primary Cell (PCell)specifically refers to a following situation: logical channel datacorresponding to the RLC layer entity is allowed to be transmitted onthe PCell, in a case that a bearer configuration corresponding to theRLC layer entity is not configured with data duplication.
 8. The methodof claim 4, wherein the RLC layer entity refers to a Primary Radio LinkControl (RLC) layer entity under a carrier aggregation duplicationfunction (CA duplication).
 9. The method of claim 8, wherein the PrimaryRLC layer entity refers to an RLC layer entity that continues to receivenew data from a Packet Data Convergence Protocol (PDCP) layer entityafter a carrier aggregation duplication function (CA duplication) of theterminal is deactivated.
 10. The method of claim 1, that the carrier setconfigured for the logical channel corresponding to the RLC layer entitycomprises the Primary Secondary Cell (PSCell) specifically refers to afollowing situation: logical channel data corresponding to the RLC layerentity is allowed to be transmitted on the PSCell, in a case that abearer corresponding to the RLC layer entity is configured with dataduplication and the data duplication is activated.
 11. The method ofclaim 1, wherein that the carrier set configured for the logical channelcorresponding to the RLC layer entity comprises the Primary SecondaryCell (PSCell) specifically refers to a following situation: logicalchannel data corresponding to the RLC layer entity is allowed to betransmitted on the PSCell, in a case that a bearer corresponding to theRLC layer entity is configured with data duplication but the dataduplication is not activated.
 12. The method of claim 1, wherein thatthe carrier set configured for the logical channel corresponding to theRLC layer entity comprises the Primary Secondary Cell (PSCell)specifically refers to a following situation: logical channel datacorresponding to the RLC layer entity is allowed to be transmitted onthe PSCell, in a case that a bearer corresponding to the RLC layerentity is not configured with data duplication.
 13. The method of claim1, wherein the RLC layer entity refers to a Primary Radio Link Control(RLC) layer entity under a carrier aggregation duplication function (CAduplication).
 14. The method of claim 1, wherein a carrier setconfigured for a logical channel corresponding to the RLC layer entityonly comprises a Secondary Cell (SCell); and triggering thecommunication failure process according to the configuration of the RLClayer entity comprises: triggering reporting of a radio link failure ofthe SCell.
 15. The method of claim 14, wherein that the carrier setconfigured for the logical channel corresponding to the RLC layer entityonly comprises the SCell specifically refers to a following situation:logical channel data corresponding to the RLC layer entity is only ableto be transmitted on the SCell, in a case that a bearer corresponding tothe RLC layer entity is configured with data duplication and the dataduplication is activated.
 16. The method of claim 14, wherein the RLClayer entity refers to a Primary Radio Link Control (RLC) layer entityunder a carrier aggregation duplication function (CA duplication). 17.The method of claim 14, wherein the RLC layer entity refers to asecondary Radio Link Control (RLC) layer entity under a carrieraggregation duplication function (CA duplication).
 18. The method ofclaim 17, wherein the secondary RLC refers to an RLC layer entity thatno longer receives new data of a Packet Data Convergence Protocol (PDCP)layer entity after a carrier aggregation duplication function (CAduplication) of the terminal is deactivated.
 19. A terminal, wherein theterminal comprises a processor, a memory, and a communication interface,wherein one or more programs are stored in the memory and configured tobe executed by the processor, and the one or more programs includeinstructions for: triggering a communication failure process accordingto a configuration of a Radio Link Control (RLC) layer entity, when theRLC layer entity reaches a maximum number of retransmission timesthrough the communication interface; wherein a carrier set configuredfor a logical channel corresponding to the RLC layer entity comprises aPrimary Secondary Cell (PSCell); and triggering the communicationfailure process according to the configuration of the RLC layer entitycomprises: triggering a radio link failure process of a Secondary CellGroup (SCG); wherein the triggering the radio link failure processcomprises the following steps: suspending all radio bearers except asignal radio bearer SRB0; resetting a Medium Access Control (MAC) layer;and initializing transmission of a Radio Resource Control (RRC)connection reestablishment request message.
 20. The terminal of claim19, wherein the communication failure comprises any of the following: aradio link failure, a radio link failure of a Secondary Cell Group(SCG), a radio link failure of a Secondary Cell (SCell).
 21. Theterminal of claim 19, wherein a carrier set configured for a logicalchannel corresponding to the RLC layer entity comprises a Primary Cell(PCell); and in an aspect of triggering the communication failureprocess according to the configuration of the RLC layer entity, theinstructions are specifically for triggering a radio link failureprocess.
 22. The terminal of claim 21, wherein that the carrier setconfigured for the logical channel corresponding to the RLC layer entitycomprises the Primary Cell (PCell) specifically refers to a followingsituation: logical channel data corresponding to the RLC layer entity isallowed to be transmitted on the PCell, in a case that a bearercorresponding to the RLC layer entity is configured with dataduplication and the data duplication is activated.
 23. The terminal ofclaim 21, wherein that the carrier set configured for the logicalchannel corresponding to the RLC layer entity comprises the Primary Cell(PCell) specifically refers to a following situation: logical channeldata corresponding to the RLC layer entity is allowed to be transmittedon the PCell, in a case that a bearer corresponding to the RLC layerentity is configured with data duplication but the data duplication isnot activated.
 24. The terminal of claim 21, wherein that the carrierset configured for the logical channel corresponding to the RLC layerentity comprises the Primary Cell (PCell) specifically refers to afollowing situation: logical channel data corresponding to the RLC layerentity is allowed to be transmitted on the PCell, in a case that abearer configuration corresponding to the RLC layer entity is notconfigured with data duplication.
 25. The terminal of claim 21, whereinthe RLC layer entity refers to a Primary Radio Link Control (RLC) layerentity under a carrier aggregation duplication function (CAduplication).
 26. The terminal of claim 19, wherein a carrier setconfigured for a logical channel corresponding to the RLC layer entitycomprises a Primary Secondary Cell (PSCell); and in an aspect oftriggering the communication failure process according to theconfiguration of the RLC layer entity, the instructions are specificallyfor triggering a radio link failure process of a Secondary Cell Group(SCG).
 27. The terminal of claim 26, wherein that the carrier setconfigured for the logical channel corresponding to the RLC layer entitycomprises the Primary Secondary Cell (PSCell) specifically refers to afollowing situation: logical channel data corresponding to the RLC layerentity is allowed to be transmitted on the PSCell, in a case that abearer corresponding to the RLC layer entity is configured with dataduplication and the data duplication is activated; or, logical channeldata corresponding to the RLC layer entity is allowed to be transmittedon the PSCell, in a case that a bearer corresponding to the RLC layerentity is configured with data duplication but the data duplication isnot activated; or, logical channel data corresponding to the RLC layerentity is allowed to be transmitted on the PSCell, in a case that abearer corresponding to the RLC layer entity is not configured with dataduplication.
 28. The terminal of claim 19, wherein a carrier setconfigured for a logical channel corresponding to the RLC layer entitycomprises only a Secondary Cell (SCell); and in an aspect of triggeringthe communication failure process according to the configuration of theRLC layer entity, the instructions are specifically for triggeringreporting of a radio link failure of the SCell.
 29. A non-transitorycomputer-readable storage medium, wherein the computer-readable storagemedium stores computer programs for electronic data interchange, whereinthe computer programs enable a computer to perform a method, applied toa terminal, for processing a radio link failure comprising triggering acommunication failure process according to a configuration of a RadioLink Control (RLC) layer entity, when the RLC layer entity reaches amaximum number of retransmission times; wherein a carrier set configuredfor a logical channel corresponding to the RLC layer entity comprises aPrimary Secondary Cell (PSCell); and triggering the communicationfailure process according to the configuration of the RLC layer entitycomprises: triggering a radio link failure process of a Secondary CellGroup (SCG); wherein the triggering the radio link failure processcomprises the following steps: suspending all radio bearers except asignal radio bearer SRB0; resetting a Medium Access Control (MAC) layer;and initializing transmission of a Radio Resource Control (RRC)connection reestablishment request message.